231534012442525 has 24 divisors (see below), whose sum is σ = 309261841747880. Its totient is φ = 170937552752640.

The previous prime is 231534012442493. The next prime is 231534012442541. The reversal of 231534012442525 is 525244210435132.

It can be written as a sum of positive squares in 12 ways, for example, as 134767325398489 + 96766687044036 = 11608933^2 + 9837006^2 .

It is not a de Polignac number, because 231534012442525 - 2⁵ = 231534012442493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84927432 + ... + 87611281.

Almost surely, 2^{231534012442525} is an apocalyptic number.

231534012442525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231534012442525 is a deficient number, since it is larger than the sum of its proper divisors (77727829305355).

231534012442525 is a wasteful number, since it uses less digits than its factorization.

231534012442525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172542865 (or 172542860 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 43.

Adding to 231534012442525 its reverse (525244210435132), we get a palindrome (756778222877657).

The spelling of 231534012442525 in words is "two hundred thirty-one trillion, five hundred thirty-four billion, twelve million, four hundred forty-two thousand, five hundred twenty-five".